Human lumbar spinal column for anatomical study Consists of intervertebral discs, sacrum with flap, coccyx, spinal nerves, and dura mater of spinal cord for detailed examination Mounted on flexible stand for display Measures 13.4 inches/34.0cm (H) Free warranty extension from 3 to 5 years when you register your product. Free access to anatomy learn software: 3B SMART ANATOMY. Includes 11 courses with 23 lectures and 117 different views of interactive virtual models. Also includes 39 quizzes for self-assessment.